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US20120033189A1 - Projector and color wheel module thereof - Google Patents

Projector and color wheel module thereof Download PDF

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Publication number
US20120033189A1
US20120033189A1 US13/178,139 US201113178139A US2012033189A1 US 20120033189 A1 US20120033189 A1 US 20120033189A1 US 201113178139 A US201113178139 A US 201113178139A US 2012033189 A1 US2012033189 A1 US 2012033189A1
Authority
US
United States
Prior art keywords
color wheel
pole
color
rotor
balance yoke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/178,139
Other languages
English (en)
Inventor
Yuan Ming Hsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delta Electronics Inc
Original Assignee
Delta Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delta Electronics Inc filed Critical Delta Electronics Inc
Assigned to DELTA ELECTRONICS, INC. reassignment DELTA ELECTRONICS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HSU, YUAN-MING
Publication of US20120033189A1 publication Critical patent/US20120033189A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/006—Filter holders

Definitions

  • the present invention relates to a color wheel module, and in particular relates to a color wheel assisting to define an initial position of a color wheel of the color wheel module.
  • FIG. 1 shows a conventional method for detecting an initial position of a color wheel.
  • a timing label 12 is attached to a shaft 11 of a color wheel 10 .
  • a sensor 1 emits a light beam toward the shaft 11 .
  • the light beam 2 is reflected by a surface of the shaft 11 , and is received by the sensor 1 .
  • a color wheel module includes a stator, a rotor, a color wheel and a sensor.
  • the rotor surrounds the stator, wherein the rotor includes a rotor body, a turn table and a balance yoke, and the balance yoke is disposed on the turn table, and the balance yoke includes an N pole portion and an S pole portion, and the rotor body is tube shaped, and the turn table is disposed on an end of the rotor body.
  • the color wheel is disposed on the rotor.
  • the sensor corresponds to the balance yoke, wherein when the balance yoke is rotated, the N pole portion and the S pole portion are rotated to generate a magnetic field variation, and the sensor outputs an electric signal according to the magnetic field variation to define an initial position of the color wheel.
  • the senor outputs an electric signal (Hi/Lo electric signal) according to the magnetic field variation to define an initial position of the color wheel, and an index delay is controlled by a calculating method according to the detected initial position to show a correct color.
  • the color wheel module of the embodiment of the invention has no light interference or dust pollution problems; thus, the initial position of the color wheel can be defined accurately.
  • FIG. 1 shows a conventional method for detecting an initial position of a color wheel
  • FIG. 2 is an assembly view of a color wheel module of an embodiment of the invention
  • FIG. 3 is an exploded view of the color wheel module of the embodiment of the invention.
  • FIG. 4 is a front view of a color wheel
  • FIG. 5 is a sectional view of the color wheel
  • FIG. 6A shows a sensor of the embodiment of the invention detecting a magnetic field variation
  • FIG. 6B shows an electric signal (Hi/Lo electric signal) according to the magnetic field variation
  • FIG. 7 shows a projector of another embodiment of the invention.
  • FIGS. 8A and 8B show modified examples of the invention.
  • FIG. 2 is an assembly view of a color wheel module 100 of an embodiment of the invention
  • FIG. 3 is an exploded view of the color wheel module 100 of the embodiment of the invention.
  • the color wheel module 100 comprises a stator 110 , a rotor 120 , a color wheel 130 and a sensor 140 .
  • the rotor 120 surrounds the stator 110 .
  • the rotor 120 comprises a rotor body 121 , a turn table 127 and a balance yoke 122 .
  • the balance yoke 122 is disposed on the turn table 127 .
  • the balance yoke 122 comprises an N pole portion 123 , an S pole portion 124 and a pole border line 125 .
  • the pole border line 125 is located between the N pole portion 123 and the S pole portion 124 .
  • the rotor body 121 is tube shaped, and the turn table 127 is disposed on an end of the rotor body 121 .
  • the color wheel 130 is disposed on the rotor 120 , and is sandwiched between the rotor body 121 and the balance yoke 122 .
  • the pole border line 125 corresponds to a particular portion of the color wheel 130 .
  • FIG. 4 is a front view of the color wheel 130 .
  • the color wheel 130 comprises a first color area 131 , a second color area 132 and a color border line 139 , and the color border line 139 and the pole border line 125 are collinear.
  • the first color area 131 comprises a first red portion R 1 , a first green portion G 1 and a first blue portion B 1
  • the second color area 132 comprises a second red portion R 2 , a second green portion G 2 and a second blue portion B 2
  • the first green portion G 1 is located between the first red portion R 1 and the first blue portion B 1
  • the second green portion G 2 is located between the second red portion R 2 and the second blue portion B 2
  • the first red portion R 1 is adjacent to the second blue portion B 2
  • the second red portion R 2 is adjacent to the first blue portion B 1 .
  • FIG. 5 is a sectional view of the color wheel 130 .
  • the rotor 120 further comprises a shaft 126 , and the shaft 126 is disposed on the balance yoke 122 .
  • the stator 110 comprises a hole 111 , and the shaft 126 is inserted into the hole 111 .
  • the rotor body 121 comprises a permanent magnet, and the stator 110 comprises a plurality of electromagnetic elements 112 , and the electromagnetic elements 112 surround the hole 111 , and the electromagnetic elements 112 are located between the hole 111 and the rotor body 121 .
  • the electromagnetic elements 112 are arranged equidistantly.
  • the sensor 140 can be disposed on a side of the turn table 127 (not shown) to detect the magnetic field variation of the balance yoke 122 .
  • the color border line and the pole border line are collinear.
  • the pole border line can correspond to any position of the color wheel, and the calculating method can be modified to control index delay and to show a correct color.
  • the external rotor DC brushless motor is utilized.
  • the invention is not limited. Motors of other types can also be utilized in the invention.
  • FIG. 7 shows a projector 200 of another embodiment of the invention, which comprises a light source 210 , an optical engine 220 and the color wheel 100 mentioned above.
  • the light source 210 provides a light beam 211 .
  • the light beam 211 passes through the color wheel module 100 to the optical engine 220 .
  • the sensor 140 is located between the color wheel 130 and the light source 210 .
  • FIGS. 8A and 8B show modified examples of the invention, wherein a non-magnetic area is formed between the N pole portion 123 ′ and the S pole portion 124 ′.
  • the N pole portion 123 ′ does not close neighbor on the S pole portion 124 ′.
  • the N pole portion 123 ′ and the S pole portion 124 ′ can be modified.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
US13/178,139 2010-08-06 2011-07-07 Projector and color wheel module thereof Abandoned US20120033189A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW99126180 2010-08-06
TW099126180A TWI434065B (zh) 2010-08-06 2010-08-06 投影裝置及其色輪組

Publications (1)

Publication Number Publication Date
US20120033189A1 true US20120033189A1 (en) 2012-02-09

Family

ID=45555926

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/178,139 Abandoned US20120033189A1 (en) 2010-08-06 2011-07-07 Projector and color wheel module thereof

Country Status (2)

Country Link
US (1) US20120033189A1 (zh)
TW (1) TWI434065B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180031821A1 (en) * 2015-07-01 2018-02-01 Materion Corporation Unbalanced hub design

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208937891U (zh) 2018-07-02 2019-06-04 中强光电股份有限公司 波长转换轮及投影装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060044526A1 (en) * 2004-09-02 2006-03-02 Minebea Co., Ltd. Method of fixing color wheel to motor
JP2007033499A (ja) * 2005-07-22 2007-02-08 Fujinon Corp カラーホイール装置
KR20070033499A (ko) * 2005-09-21 2007-03-27 에스케이 텔레콤주식회사 발신자에 따른 전화번호 변경 안내 서비스 제공 방법
US20090310090A1 (en) * 2008-06-13 2009-12-17 Hon Hai Precision Industry Co., Ltd. Color wheel and projector having same
US20110031965A1 (en) * 2009-08-07 2011-02-10 Tdk Corporation Magnetic Sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060044526A1 (en) * 2004-09-02 2006-03-02 Minebea Co., Ltd. Method of fixing color wheel to motor
JP2007033499A (ja) * 2005-07-22 2007-02-08 Fujinon Corp カラーホイール装置
KR20070033499A (ko) * 2005-09-21 2007-03-27 에스케이 텔레콤주식회사 발신자에 따른 전화번호 변경 안내 서비스 제공 방법
US20090310090A1 (en) * 2008-06-13 2009-12-17 Hon Hai Precision Industry Co., Ltd. Color wheel and projector having same
US20110031965A1 (en) * 2009-08-07 2011-02-10 Tdk Corporation Magnetic Sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180031821A1 (en) * 2015-07-01 2018-02-01 Materion Corporation Unbalanced hub design
US9933612B2 (en) * 2015-07-01 2018-04-03 Materion Corporation Unbalanced hub design

Also Published As

Publication number Publication date
TW201207427A (en) 2012-02-16
TWI434065B (zh) 2014-04-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DELTA ELECTRONICS, INC., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HSU, YUAN-MING;REEL/FRAME:026588/0534

Effective date: 20110603

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION